From e5ee9125ecff23f337f26834c07a1f0252378818 Mon Sep 17 00:00:00 2001
From: Bastian Ruppert <Bastian.Ruppert@Sewerin.de>
Date: Tue, 4 Oct 2011 23:43:33 +0000
Subject: [PATCH] Davinci: ea20: add gpio for keeping power on in
board_late_init
The pin called HALTEN drives a transistor to operate the supply
voltage. After HALTEN is high, the user can release the power
switch button and the device will stay powered on.
Signed-off-by: Bastian Ruppert <Bastian.Ruppert@Sewerin.de>
CC: sbabic@denx.de
CC: dzu@denx.de
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
---
board/davinci/ea20/ea20.c | 25 +++++++++++++++++++++++++
include/configs/ea20.h | 1 +
2 files changed, 26 insertions(+)
diff --git a/board/davinci/ea20/ea20.c b/board/davinci/ea20/ea20.c
index da9086a527..1a57baf4e2 100644
--- a/board/davinci/ea20/ea20.c
+++ b/board/davinci/ea20/ea20.c
@@ -98,6 +98,10 @@ const struct pinmux_config gpio_pins[] = {
{ pinmux(13), 8, 3 } /* GPIO6[12] U0_SW1 on EA20-00101_2*/
};
+const struct pinmux_config halten_pin[] = {
+ { pinmux(3), 4, 2 } /* GPIO8[6] HALTEN */
+};
+
static const struct pinmux_resource pinmuxes[] = {
#ifdef CONFIG_SPI_FLASH
PINMUX_ITEM(spi1_pins),
@@ -205,6 +209,27 @@ int board_init(void)
return 0;
}
+
+#ifdef BOARD_LATE_INIT
+
+int board_late_init(void)
+{
+ struct davinci_gpio *gpio8_base =
+ (struct davinci_gpio *)DAVINCI_GPIO_BANK8;
+
+ /* PinMux for HALTEN */
+ if (davinci_configure_pin_mux(halten_pin, ARRAY_SIZE(halten_pin)) != 0)
+ return 1;
+
+ /* Set HALTEN to high */
+ writel((readl(&gpio8_base->set_data) | (1 << 6)),
+ &gpio8_base->set_data);
+ writel((readl(&gpio8_base->dir) & ~(1 << 6)), &gpio8_base->dir);
+
+ return 0;
+}
+#endif /* BOARD_LATE_INIT */
+
#ifdef CONFIG_DRIVER_TI_EMAC
/*
diff --git a/include/configs/ea20.h b/include/configs/ea20.h
index d86207a3b2..916ad00541 100644
--- a/include/configs/ea20.h
+++ b/include/configs/ea20.h
@@ -31,6 +31,7 @@
#define CONFIG_SYS_USE_NAND
#define CONFIG_DRIVER_TI_EMAC_USE_RMII
#define CONFIG_BOARD_EARLY_INIT_F
+#define BOARD_LATE_INIT
/*
* SoC Configuration
--
2.25.1